1. Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Baltimore, Maryland
2. Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, Maryland
3. Department of Radiology, University of Pennsylvania, Philadelphia
4. Center for Biomedical Image Computing and Analytics, University of Pennsylvania, Philadelphia
5. Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, Maryland
6. Department of Diagnostic Medicine, University of Texas, Austin
7. Department of Neurology, University of Pennsylvania, Philadelphia